KR200245118Y1 - Balance bobin for deflection york - Google Patents

Abstract

The present invention relates to a balance bobbin for a deflection yoke, which has a pipe shape and is provided between a pair of windings in which a plurality of coils are wound on an outer circumferential surface, and a pair of windings to interconnect a pair of windings and cut in the longitudinal direction. A bobbin having a connecting portion having an opening; A core housed in the inner circumferential surface of the bobbin and having a thread formed on the outer circumferential surface; And a cover which is detachably coupled to the connection part so as to close and open the opening of the connection part corresponding to the shape of the connection part to prevent the core from being accommodated in the inner circumferential surface of the bobbin. Thereby, assembly time can be shortened and productivity can be improved.

Description

Balance bobbin for deflection yoke {BALANCE BOBIN FOR DEFLECTION YORK}

The present invention relates to a balance bobbin for a deflection yoke, and relates to a balance bobbin for a deflection yoke with an improved coupling structure between a core and a bobbin.

In general, the deflection yoke is provided in a cathode ray tube such as a TV cathode ray tube or a monitor to deflect an electron beam emitted from an electron gun.

The deflection yoke distinguishes the vertical deflection coil which deflects the electron beam in the vertical direction, the horizontal deflection coil which deflects the electron beam in the horizontal direction, and the position of the vertical deflection coil and the horizontal deflection coil, so as to be electrically insulated from each other. It consists of a separator.

A circuit board is provided on the side of the neck of the separator, and a balance bobbin is provided on the circuit board to prevent deterioration of image quality due to mis-landing in which the electron beam deviates to the outer circumference of the stripe.

4 and 5, the conventional balance bobbin 120 has a pipe shape and is formed between a pair of winding parts 124 and each winding part 124 having a plurality of coils 126 formed on an outer circumferential surface thereof. The bobbin 122 having a connecting portion 130 provided to interconnect each of the windings 124, the core 134 is received and screwed to the inner peripheral surface of the bobbin 122, the bobbin 122 and the core 134 Rubber band 146 is provided to prevent loosening by screwing.

At both ends of each winding portion 124, there are provided extension protrusions 128 protruding radially from the outer circumferential surface. The extension protrusions 128 provided at both ends of the bobbin 122 have a plurality of first catching jaws 129 which are formed at substantially right angles in the radial direction from each of the extension protrusions 128 and extend in a predetermined length and are coupled to the circuit board. This is provided. In addition, the connecting portion 130 is provided with a second locking jaw 133 which is formed to extend from the outer circumferential surface of the connecting portion 130 to a predetermined length in a radial direction and is coupled to the circuit board together with the first locking jaw 129.

On the inner circumferential surface of each of the winding parts 124 and the connection part 130, a female screw 127 is formed along the entire inner circumferential surface to be screwed with the core 134.

Each winding portion 124 and the connecting portion 130 is integrally molded as a plastic material by a mold (not shown).

Meanwhile, the core 134 has a pipe shape, and a thread 136 corresponding to the female thread 127 of the inner circumferential surface of the bobbin 122 is formed along the entire outer circumferential surface on the outer circumferential surface so as to be screwed with the bobbin 122. The receiving hole 138, which can accommodate a tool such as a driver, is formed through the longitudinal direction to move the core 134 along the inner circumferential surface of the bobbin 122.

In addition, a rubber band 146 is inserted in the longitudinal direction between the inner circumferential surface of the bobbin 122 and the outer circumferential surface of the core 134, so that the bobbin 122 and the core 134 are fastened with a predetermined torque when screwed together and the bobbin 122 ) And the core 134 to prevent loosening.

By such a configuration, the assembly process of the bobbin 122 and the core 134 will be described.

First, a plurality of coils 126 are wound around each winding portion 124 of the bobbin 122, and a rubber band 146 is inserted in the longitudinal direction between the inner circumferential surface of the bobbin 122 and the outer circumferential surface of the core 134.

Next, the bobbin 122 and the core 134 are screwed while inserting the core 134 into one side inner circumferential surface of the bobbin 122.

The core 134 is rotated along the inner circumferential surface of the bobbin 122 by coupling a tool such as a driver to the receiving hole 138 of the core 134 so that the core 134 is at a predetermined position of the inner circumferential surface of the bobbin 122. By moving, the core 134 is assembled to the bobbin 122, and the assembled balance bobbin 120 is coupled to the circuit board.

By the way, in this conventional deflection yoke balance bobbin, by screwing the core to the inner circumferential surface of the bobbin threaded along the entire inner circumferential surface, the screwing length of the core is long, the assembly time takes a long time and the productivity is reduced There is this.

Accordingly, an object of the present invention is to provide a balance bobbin for deflection yoke that can shorten the assembly time and improve productivity.

1 is a perspective view of a general deflection yoke,

2 is a perspective view of the combination bobbin for deflection yoke according to the present invention,

3 is an enlarged cross-sectional view taken along line III-III of FIG. 2;

4 is a perspective view of the conventional combination bobbin for deflection yoke,

5 is an enlarged cross-sectional view taken along the line VV of FIG. 4.

* Explanation of symbols for the main parts of the drawings

1: deflection yoke 10: vertical deflection coil

16: circuit board 20: balance bobbin

22: bobbin 24: winding

26: coil 30: connection

32: hook groove 34: core

36: thread 40: cover

42: rib 44: hook

In order to achieve the above object, the present invention, in the balance bobbin for deflection yoke; A bobbin having a pipe shape and having a pair of windings in which a plurality of coils are wound on an outer circumferential surface, and a connection portion provided between the pair of windings to interconnect the pair of windings and have an opening cut in the longitudinal direction; A core housed in the inner circumferential surface of the bobbin and having a thread formed on the outer circumferential surface; Balance bobbin for deflection yoke characterized in that it comprises a cover that is detachably coupled to the connecting portion so as to close and open the opening of the connecting portion corresponding to the shape of the connecting portion to prevent separation of the core accommodated in the inner peripheral surface of the bobbin. To provide.

Here, the inner circumferential surface of the cover is provided along the longitudinal direction and provided with at least one rib coupled to the thread of the core, so that the thread of the core outer circumferential surface and the rib of the cover are fitted, the core is fastened to the cover with a predetermined torque and At the same time, separation and loosening from the cover are prevented.

In addition, a pair of hook grooves are provided on an outer circumferential surface of the connection portion, and a pair of hooks are coupled to and detachable from the connection portion of the cover by providing a pair of hooks engaged and released from the hook groove of the connection portion.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

1 is a perspective view of a general deflection yoke. As shown, the deflection yoke 1 includes a vertical deflection coil 10 for deflecting the electron beam in the vertical direction, a horizontal deflection coil (not shown) for deflecting the electron beam in the horizontal direction, a vertical deflection coil 10 and It is composed of a separator 12 to distinguish the position of the horizontal deflection coil and to be electrically insulated from each other.

The circuit board 16 is provided on the side surface of the neck portion 14 of the separator 12, and the balance bobbin 20 prevents deterioration of image quality due to mis-landing in which the electron beam deviates to the outer circumference of the stripe. ) Is provided.

2 and 3, the balance bobbin 20 according to the present invention has a pipe shape and a pair of winding parts 24 and each winding part 24 in which a plurality of coils 26 are formed on an outer circumferential surface thereof. A bobbin 22 having a connecting portion 30 provided between the windings 24 and interconnecting each winding 24 and having a longitudinally cut opening 30a, and a core received and screwed on the inner circumferential surface of the bobbin 22; 34 and a cover 40 for closing and opening the opening 30a of the connecting portion 30 and preventing the core 34 from being separated.

At both ends of each of the winding portions 24, there are provided extension protrusions 28 protruding radially from the outer circumferential surface. The extension protrusions 28 provided at both ends of the bobbin 22 have a plurality of first catching jaws that are formed at substantially right angles in the radial direction from each of the extension protrusions 28 and extend in a predetermined length to be coupled to the circuit board 16. (29) is provided.

The outer circumferential surface of the connecting portion 30 is provided with a pair of hook grooves 32 to which the pair of hooks 44 provided on the cover 40 to be described later are engaged and released. In addition, the connecting portion 30 is provided with a second locking jaw 33 which is formed to extend from the outer circumferential surface of the connecting portion 30 to a predetermined length in a radial direction and is coupled to the circuit board 16 together with the first locking jaw 29. have.

Each winding portion 24 and the connecting portion 30 are integrally molded as a plastic material by a mold not shown.

The core 34 accommodated in the inner circumferential surface of the bobbin 22 has a pipe shape as a material of metal, and the thread 36 is along the entire outer circumferential surface of the core 34 so as to be in close contact with the ribs 42 of the cover 40 to be described later. In the inner circumferential surface, a receiving hole 38 for accommodating a tool such as a driver is formed through the longitudinal direction so as to rotate the core 34 along the inner circumferential surface of the bobbin 22.

On the other hand, the cover 40 detachably coupled to the connecting portion 30 has a pipe shape cut in the longitudinal direction corresponding to the shape of the connecting portion 30. A plurality of ribs 42 are formed on the inner circumferential surface of the cover 40 along the longitudinal direction to fit with the threads 36 of the outer circumferential surface of the core 34 to engage with the core 34 to prevent the core 34 from being separated. ) Is further provided. In addition, both ends of the cover 40 are provided with a pair of hooks 44 engaged with and released from the hook groove 32 of the connecting portion 30. Both edges of the cover 40 are supported in close contact with one extension protrusion 28 of each of the windings 24. The cover 40 is molded as a material of plastic by a mold not shown.

By such a configuration, the assembly process of the bobbin 22 and the core 34 will be described.

First, a plurality of coils 26 are wound around each winding part 24 of the bobbin 22, and a separate jig (not shown) is inserted into one inner circumferential surface of the bobbin 22.

Next, the core 34 is inserted into the inner circumferential surface of the bobbin 22 through the other inner circumferential surface of the bobbin 22 located on the opposite side of the jig.

The hook groove 32 of the connecting portion 30 is closed so as to close the opening 30a of the connecting portion 30 from the outside of the bobbin 22 and to be closely attached to the one side protruding portion 28 of each winding portion 24. Engage the hooks 44 of the cover 40 on. At this time, the core 34 does not move along the inner circumferential surface of the bobbin 22 due to the frictional force generated by the end of the thread 36 on the outer circumferential surface of the core 34 and the ribs 42 of the cover 40 mutually contacting each other. do.

After the jig is separated from the bobbin 22, a tool such as a driver is coupled to the receiving hole 38 of the fixed core 34 so that the core 34 is positioned at a predetermined position on the inner circumferential surface of the bobbin 22, approximately the bobbin 22. The core 34 is rotated along the inner circumferential surface of the bobbin 22 so as to be located at the center region of the backplane. At this time, the rib 42 of the cover 40 made of plastic is shaped by the rotational force of the thread 36 formed on the outer circumferential surface of the core 34 made of metal, that is, the rib 42 of the cover 40 is formed. As the thread groove is generated, the core 34 is fastened to the cover 40 with a predetermined torque, and at the same time, separation and loosening from the cover 40 are prevented.

Then, the core 34 is assembled to the bobbin 22 to couple the completed balance bobbin 20 to the circuit board 16.

As a result, the balance bobbin prevents deterioration of image quality due to mis-landing in which the electron beam deviates to the outer circumference of the stripe. If the mis-landing phenomenon of the electron beam is found, the mis-landing phenomenon of the electron beam is compensated by rotating the core in the bobbin, that is, the thread of the outer circumferential surface of the core is moved along the screw groove shaped to the rib of the cover coupled to the bobbin. You can do it.

In this way, by coupling the core to the cover coupled to the connecting portion of the bobbin, not only the core is fastened to the cover with a predetermined torque but also the screwing length of the core is shortened. Therefore, the assembly time of the core and the bobbin can be shortened and the productivity can be improved.

As described above, according to the present invention, by improving the coupling structure of the core and the bobbin, it is possible to shorten the assembly time and improve the productivity.

Claims (3)

In the balance bobbin for deflection yoke; A bobbin having a pipe shape and having a pair of windings in which a plurality of coils are wound on an outer circumferential surface, and a connection portion provided between the pair of windings to interconnect the pair of windings and have an opening cut in the longitudinal direction; A core housed in the inner circumferential surface of the bobbin and having a thread formed on the outer circumferential surface; Balanced bobbin for deflection yoke comprising a cover that is detachably coupled to the connecting portion so as to close and open the opening of the connecting portion corresponding to the shape of the connecting portion to prevent the core from being detached from the inner circumferential surface of the bobbin. . The method of claim 1, Balanced bobbin for deflection yoke, characterized in that the inner circumferential surface of the cover is provided with one or more ribs protruding along the longitudinal direction is coupled to the thread of the core. The method according to claim 1 or 2, A pair of hook grooves are provided on the outer circumferential surface of the connection portion, and a pair of hooks are provided at the end of the cover, the pair of hooks being coupled to and released from the hook groove of the connection portion.